package com.ssy.interceptor;

import com.ssy.utils.JwtUtils;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import static org.apache.http.HttpStatus.SC_UNAUTHORIZED;

/**
 * token校验拦截器
 */
@Slf4j
// @Component
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.获取到请求路径
        String requestURI = request.getRequestURI(); // /logintokenInterceptor

        // 2.判断是否是登录请求, 如果路径中包含/login, 说明是登录操作, 放行
        if(requestURI.contains("login")) {
            log.info("登录请求, 放行");
            return true;
        }

        // 3. 获取请求头中的token
        String token = request.getHeader("token");
        // 4. 判断token是否存在, 如果不存在, 拦截, 返回401状态码
        if (token == null || token.isEmpty()) {
            log.info("token为空, 响应401");
            response.setStatus(SC_UNAUTHORIZED);
            return false;
        }
        // 5. 如果token存在, 校验token, 如果校验失败, 拦截, 返回401状态码
        try {
            JwtUtils.parseJwt(token);
        } catch (Exception e) {
            log.info("token非法, 响应401");
            response.setStatus(SC_UNAUTHORIZED);
            return false;
        }
        // 6. 校验通过, 放行
        log.info("token合法");
        return true;
    }
}
